#include<algorithm>
#include<numeric>

struct{
    double x;
    double y;
    double z;//if you need it...
}Coordi,*Crd;

template<typename T>
    T line;
    
#ifndef _CPP_NEWFEATURE_
#define _CPP_NEWFEATURE_
#include<iostream>
#include<fstream>
#include<filesystem>

namespace Cpp{
    namespace IO{
        using std::cin;
        using std::cout;
        using std::endl;
        using std::cerr;
        
    };
    namespace FileIO{
        using std::ofstream;
        using std::ifstream;
        using namespace std::filesystem;
    };
    namespace format{
        using std::oct;
        using std::hex;
        using std::dec;
        using std::ios_base;

    };
};
#endif

using std::string;

static constexpr char _tab(0x9);
